TinyG not

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  • April 29, 2015 at 3:15 am #7675
    Oliver
    Member

    Hi,

    My TinyG ignores the G38.2 command. Started playing with Chilipeppr Z-Probe command to no avail. Manually typing code doesn’t do anything either. Can’t get the bit to probe down Z-minus (Touchplate widget). Is there a global setting I’m missing?

    Everything else works great – homes, cuts, traverses, etc., you name it all good… stuck for ideas.

    TinyG 0.97 440.14 JSON1.8-Win/1.77-Mac, latest Chrome Win and Mac, different cables, rebooting, using ChiliPeppr in “forcerefresh” mode and not, NC switches with inverting circuit to make NO probe on Z axis work (probe stops manual Z-down move cold), set to Z-min in limit mode ($zsn=2 $zsm=3), mm mode, disconnected, re-connected, re-set, swapped USB cables… out of ideas.

    Any hints and tips very welcome!

    Oliver

    April 29, 2015 at 8:23 am #7676
    cmcgrath5035
    Moderator

    Me again.

    I am not a G38.2 user, so have no hands on to offer.
    Read thru this Issue to see if there are helpful hints

    I think I know what you describe about switches and inverters, but it would be helpful if you post your complete parameter set (the archive file, once you can get it 🙂 )so we can have a look if the Issue discussion does not clarify for you the G38.2.
    Posting your parameters to a Cloud resource (Dropbox, GDrive, etc.) with a link here is preferred, long lists don’t display well here.

    Get to know what goes on at

    Some of the more ‘advanced’ issues show up in that space.

    May 3, 2015 at 5:57 am #7694
    Oliver
    Member

    After more trial and error, Z-probe now works. All limit/homing switches still NC, no inverter circuit (probe command must just look for a change of state rather than a specific state).

    The only downside is the loss of the Z-min limit function: probing only seems to work if Z-min is completely disabled.

    That seems to gel with what’s out on the forums (shapeoko, CP), but seems (with blissful ignorance) a simple fix in the TinyG firmware?

    Hunting this issue down makes me doubly appreciate the excellent level of Synthetos’ documentation. Three cheers (and to you, Mr C 😉

    Oliver

    May 3, 2015 at 8:00 am #7695
    cmcgrath5035
    Moderator

    That’s good news, Oliver. I believe your conclusions are correct on the quick evolution of switch treatment.

    In the future, when you might evolve to tinyG2, you will see some significant enhancements to limit switch setup and operation, including individual switch setups for NC and NO.

    I isn’t at all clear to me how a useful Zmin limit switch could be physically implemented, at least on my ShapeOko. The problem, as I see it, is the variability of tool tip location as one changes tools and tool types.
    Not to mention changing spindles.
    This comment of course in the context to a CNC mill, not a 3D printer set up.

    Enjoy your machine

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